BUS 120: Business Computer Applications I: Discovering Computers: Chapter 4
Name:___________________________________________________________________
1. The box-like case that houses the electronic components of the computer:
_____________________________________________________
2. Also called the system board, this is the main circuit board, which contains many integrated
circuits.
______________________
3. The central processing unit (CPU) is composed of two components or units:
______________________
______________________
4. The ALU performs what kind of operations?
5. For every instruction, the control unit repeats four basic operations
______________________ _________________________
______________________ _________________________
6. Clock speed is measured in cycles per second or _________________
7. Computer signals powered by electricity (on/off): _______________
8. The binary system is a number system that has just two unique digits: _____ and _____.
9. The smallest unit of data the computer can represent is called a ______, which stands for
______________________________.
10. 8 bits = 1 __________
11. 1 kilobyte = ____________ bytes.
12. 1 megabyte = ____________ bytes.
13. 1 gigabyte= ______________ bytes
14. The system unit contains two types of memory. RAM is ______________, meaning that if
your computer’s power is turned off, you will lose the contents.
15. ____________ memory is a type of nonvolatile memory that can be erased electronically
and rewritten.
16. This port transmits data one bit at a time: _______________
17. This port transmits data more than 1 bit at a time (common: 8 bits or 1 byte at a time):
_______________
18. This port can connect up to 127 different peripherals with a single connector type:
19. List two special purpose ports: ___________________________________________
20. Converts AC (alternating current) to DC (direct current) ________________
21. A channel or “highway” which allows devices inside the computer to communicate with each
other is a __________.
22. An open area inside the system unit used to install additional equipment is a _____________.